tle@fedora ~/W/wavs (main)> rm *.flac && time flac -V -8 -j 32 collectathon.wav
flac 1.5.0
Copyright (C) 2000-2009 Josh Coalson, 2011-2025 Xiph.Org Foundation
flac comes with ABSOLUTELY NO WARRANTY. This is free software, and you are
welcome to redistribute it under certain conditions. Type `flac' for details.
collectathon.wav: Verify OK, wrote 8261224 bytes, ratio=0.551
________________________________________________________
Executed in 186.32 millis fish external
usr time 1.43 secs 359.00 micros 1.42 secs
sys time 0.02 secs 0.00 micros 0.02 secs
tle@fedora ~/W/wavs (main)> rm *.flac && time flac -V -8 -j 1 collectathon.wav
flac 1.5.0
Copyright (C) 2000-2009 Josh Coalson, 2011-2025 Xiph.Org Foundation
flac comes with ABSOLUTELY NO WARRANTY. This is free software, and you are
welcome to redistribute it under certain conditions. Type `flac' for details.
collectathon.wav: Verify OK, wrote 8261224 bytes, ratio=0.551
________________________________________________________
Executed in 963.39 millis fish external
usr time 962.46 millis 419.00 micros 962.04 millis
sys time 0.00 millis 0.00 micros 0.00 millis
So with 32 threads, it's 5x faster than 1 thread.